Leather-staking machine.



F. J. & M. A. ZDANOWSKI. LEATHER STAKING MACHINE.

APPLIUATIOX FILED DBO. 11, 1908. 91 5,530, Patented Mar. 16, 1909.

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E. J. & M. A. ZDANOWSKI.

LEATHER STAKING MAGHINB.

APPLIGATIOR FILED mm. 11, 100B.

91 5,530. Patented Mar. 16, 1909.

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F. J. & M. A. ZDANOWSKI.

LEATHER STAKING momma LPILIOATIOH FILED 1130.11, 1908.

91 5,530. Patented Mar. 16, 1909.

3 SHEETS-SHEET 3.

UNITED sTna Es PATENT oEEIo FRANK J. ZDANOWSKI AND MICHAEL A. ZDANOWSKI,OF PHILADELPHIA, PENNSYLVANIA.

LEATHER-STAKING MACHINE.

Application filed December 11, 1908.

To all whom it may concern:

Be it known that we, FRANK J. ZDANOW- sin and MICHAEL A. ZDANOWSKI,citizens of the United States of America, residing at Philadelphia, inthe county of Philadelphia and State of Pennsylvania, have invented aLeather-Staking Machine, of which the following is a specification.

Our invention is an improvement in machines for treating hides, skins,or leather, and relates more especially to staking or stretchingmachines of that class which coinprise a pair of reciprocatingstaking-jaws, iaving rollers and knives, respectively, which are ada tedto close on the skin or leather and su ject the same to a scra ing andstretching operation while being he d at one end by the operator orattendant who shifts the skin or leather as required until every portionof the same has been treated or staked. In machines of this character itis customary to have a table for convenience in shifting the skin orleather during the forward or open movement of the staking-jaws, and atthe forward end of the table there is usually a roller between which andthe body of the operator one end of the skin or leather is held duringthe staking operation. For the purpose of increasing or diminishing thetension of the jaws, according to the texture of the skin or leatherbeing staked, some means are usually provided for adjusting the rollersand knives with respect to each other.

The primary object of our invention is to provide a simple and effectivemechanical device which operates in conjunction with the roller at theforward end of the table to hold the skin or leather during the stakingoperation, and thus relieve the operator of the danger or bodily harmwhich usually attends the pressing of his body against the skin orleather in holding it against the roller.

A further object of the invention is to provide certain mechanism bywhich one of the knives of the lower staking-jaw may be readily andaccurately adjusted. during the operation of the machine.

Vi'ith these principal objects in view our invention consists in theparticular construction and arrangement of certain detail parts ormechanisms of a leather staking machine, all as hereinafter fullydescribed and specifically set forth in the appended claims.

In the accompanying drawings, which form a part of this specificationFigure 1 is a side elevation of a leather staking machine 1 or cam-blockthereon, is he Specification of Letters Patent.

Patented March 16, 1909.

Serial No. 466,982.

embodying our invention. Fig. 2 is a crosssectional view on the line 2-2of Fig. 1. Fig. 3 is a similar view on the line 33 of Fig. 1. Fig. 4 isa longitudinal sectional view through the lower staking-j aw, showingthe means of adjustment for one of the knives. Fig. 5 is a detail viewof the forward end of the machine. Fig. 6 is a horizontal sectional viewthrou h the upper end of the post or standard, and including the movablepart of the gripping device. Fig. 7 is a transverse sectional viewthrough the upper art or engaging-head of the movable member of thegrippin device. Figs. 8 and 9 are detail views of the cams for operatingthe gripping mechanism.

Like numerals of reference indicate like parts in all the figures of thedrawings.

In the present instance we have shown our invention as applied to aconventional type of leather staking machine, but of course it will bereadily understood that the same maybe applied to other forms ofmachines similar in construction to that herein shown. This machine comrises a supporting frame 1, the interme iate portion of which isprovided at its upper end with o posite slide-ways 2, in which travels asli e or carriage 3 carrying the upper and lower staking-'aws 4 and 5,respectively, and pivoted to t e rear end of said slide or carriage is aconnecting-rod or pitman 6, extending from a pitman-wheel 7, the latterbeing mounted on a main driving-shaft 8, journaled in suitable bearingsat the upper part of the rear end of the supporting-frame, whereby areciprocating motion may be imparted to the slide or carriage and thestaking-jaws carried thereby, said staking-j aws being pivoted neartheir rear ends in the slide or carriage for the purpose hereinafterexplained. In addition to the reciprocating motion the outer or forwardends of the staking-j aws are opened and closed in. the operation ofstaking the leather, and this open and closing motion is im arted bymeans of opposite cams 9 and 10 on t e forward end of the pitman-rodwhich. act upon the rearwardly projecting ends of the upper and lowerstaking-jaws, respectively. As will be seen the upper aw is providedwith the usual adjustable cam-block 11 cooperating with the cam 9, andthe lower jaw with a similar cam-block, as 12, cooperating with the cam10 at the underside of the pitmanrod. The rear end of the u er staking-jaw,

d in engagement with its o )erating-cam by means of tensionrods 13 whichrise from the slide or carriage 3 and pass upward beyond the guide-plate14 to receive the compression springs 15, while the rear end of thelower staking-'aw, or camhloek thereon, is held in engaging with itsoperating cam by means of a fiat spring 16, which extends forwardly fromthe carriage and bears upon said staking-jaw. The connection andarrangement 01' these parts are such that the front ends of thestaking-jaws will be opened and remain open during the forward movementof the slide or carriage and jaws, and will be closed and remain closedduring the rearward movement of the carriage an d aws.

At the forward end of the u )per staking- 'aw there is a roller 17,attached thereto by a racket-plate 18, and this jaw may be provided alsowith an auxiliary roller 19, disposed in front and on a line with theupper part of the roller 17. The lower staking-j aw is provided at itsforward end with a pair of j spaced apart knives 20 and 21, the upperedge of the knife 21 being on a plane slightly above the plane of theupper edge of the companion knife 20, as shown in Fig. 4 of thedrawings. These knives cooperate with the rollers 17 and 19, to clampupon opposite sides of the leather and impart the staking operation, andin order to vary the tension said knives are adjustable upon the jaw.The adjustability of the rear knife 21 is secured by means of thebracket-plate 22 to which the knife is bolted, said bracket-plate beingse cured upon the upper side of the staking-j aw by means 01' set-screws23 passing through slots 24 in the bracket-plate; while the frontknifeis adjusted by means of certain 1nechan ism hereinafter described andwhich forms 1 part of our invention. The rollers and cooperating kniveswork through a longitudinal opening in the table 25 supported at thefront end of the machine, and at the forward end of said table isattached, in a suitable manner, the roller 26, against which one end ofthe leather or skin is held during the staking operation.

The parts thus far described are common to the conventional type oileather staking machines, and the o )eration thereof will be readilyunderstood y those skilled in the art, for the skin or leather to bestaked having been placed upon the table while the staking-jaws areadvancing in their 0 en position and held against the roller 26 wil beclamped between the rollers and knives of the staking-jaws and subjectedto a staking operation during the rearward movement 01' said jaws, andafter each such operation the operator or attendant shifts the skin orleather until every portion of the same has been properly treated orstaked.

For the purpose of holding the skin or leather against the roller 26during the staking o .)eration ol the jaws we provide certain holding orgripping mechanism, which we will now describe.

At the forward end of the machine rises a post or standard 27, having ahollow crosspiece 28 at its upper end which provides a convenient restagainst which the operator may lean, and is also adapted to receive theupper transverse member or engaging portion of the holding device, forwhich purpose the inner side of said hollow cross-piece is open, asshown in Fig. (5. The post or standard is pivoted at its lower end onthe projecting ends of a transverse pin 29 iixed in the upturned ends ofthe base pieces of the supporting-frame oi the machine, whereby theupper end or cross-piece of said. post or standard may be adjusted toand from the table, and to secure the same in adjusted. positionset-screws 30 are threaded in the lower end thereof to impinge againstthe pin 29, as indicated in dotted lines, Fig. 5. iivoted on thetransverse pin between the upturned ends of the base pieces or" thesupportingframe is an extensible rod :51, the lower end of which dependsbelow the pin and is connected to an operatingslraft, hereinafterdescribed. The upper end oi this extensible rod is provided with across-piere 313, having a concavity in which. is seated a curved plate33 carrying a padding 34 adapted to co-art with the roller 26 to clampthe skin or leather against said roller. The padding is glued orotherwise attarhed to the plate and the latter is provided with bolts 35by which it is rounected to the cross-picee 32, said cross-piece havingslots 36 through which the bolts pass and which permit of the paddingand its carrying-plate being adjusted with respect to the periphery olthe roller. As will be seen, the upper part oi the rod and the engagingmember thereof enter the hollow standard and hollow cross-piece whenmoved away from the roller, and when the engaging I1l(Ill her is incontact with the roller there is a space between said engaging memberand the cross-piece of the standard, and in order to i prevent the skinor leather from being accidentally pushed into this space and caughtbetween said arts we provide flexible guard-strips 37, which extend fromthe ends of the engaging member across the ends of the hollowcross-piece 2S and into the latter where they are attached tospring-actuatcd rollers 38, adapted to keep the guard-strips taut duringthe forward and bi'ickward movements of the engaging member at the upperend of the extensible rod. l or increasing the tension of theguard-strips the springs of the rollers are tightened by means of theratchcteplates 39 and engaging pawls 40, said ratchet-plates havingsquared guilgeons 41 (Fig. 5), by which they may be turned with the useof an ordinary wrench. The guard-strips pass over rollers 43 at oppositesides of the end pieces of the hollow cross-piece 225, said rollersbeing employed to reduce friction. As will be understood theguard-strips wind and unwind on the springrollers as the enga ing memberof the holding device moves bac *ward and forward. The rod 31 is made intwo parts or sections, the lower section being reduced at its up or endto take into a socket at the lower our of the upper section, (see Fig.7), and so that said upper section may be raised and lowered on thelower section, and thereby adjust the rod as to length. The adjustmentis secured or fixed by means of a set-screw 42, threaded through thefront wall of the socket to iminge against the reduced upper end of theower section of the rod. This adjustment, in connection with theadjustment of the pad and its carrying-plate, permits the engagingmember at the upper end of the extensible rod to be properly positionedwith respect to the roller 26, and take up for any wear on the engagingsurfaces. For convenience in adjusting the set-screw 42 the hollow postor upright 27 is provided with an o cning giving access to said screwand normal y covered by a plate 44. It will be understood, of course,that this holding device should move forward to engage and press theskin or leather against the roller 26 when the staking-jaws have reachedtheir forward position, and should continue to hold the skin or leatherduring the rearward movement oi" the jaws in the staking operation. Inorder to accomplish this operation of the holding device it is actuatedirectly from the main driving shaft 8 by means of intermediateconnections. These connections comprise a short connecting-rod 45,swiveled at one end to the lower end of the extensible rod 31 and at theother end to a long connectingrod 46 extending from one member of abell-crank lever 47, mounted on a suitably supported transverse shaft48, said bell-crank lever being operated or rocked by means of avertical connecting-rod it), which is reciprocated by cams on the shaft8. l he up vcr end of the connecting-rod 49 is provided with an enlargedlat-portion or plate 50, having a slot 5], (indicated in dotted lines inFig. 8,) throu h which the shaft passes and is also provit ed atopposite sides with rollers 52, with which the earns 58 and 54 engage,respectively. The rollers are journaled in brackets, as 55, formed intorally with. the plate 50 of the comiccting-roi and the cams are providedwith set-screws 56 so that they may be adjusted with respect to therollers. As will be seen the cams are arranged so that they willpositively actuate the connectingrod, that is to say, one of the camswill raise the rod and hold it raised until the other cam on ages tolower the rod, the latter cam then ho ding the rod lowered until theengagement of the first mentioned. cam. 'lhc cams l l are shaped so asto impart the proper mover ments to the swinging holding device at thefront end of the machine, that is to say the cam 54, having the longerperiphery, acts to move the engaging member of said holding deviceagainst the roller 26, or interposed skin, when the staking jaws are attheir forward position, and hold it in this position, during therearward movement of the staking-jaws, while the other ram, 53, servesto move said engaging-member backward or away from the roller to releasethe skin and to hold the engaging-member temporarily within the hollowcross-piece 28 of the standard or post 27.

F or the purpose of adjusting the swinging holding device so that itspressure against the roller 26 may be regulated, the shortconnecting-rod 45 extends at an upward inclination from the lower end ofthe rod 31 to its connection with the connecting-rod 46, and the latterextends at a slight downward inclination to the bell-crank lever,whereby the raising and lowering of the front end of said connecting-rod46 will change the location of the upper end of the holding device andcause it to press against the roller either hard or lightly, accoriilingto the adjustment of the connecting-rod. For adjusting thisconnecting-rod we provide a frame secured between the side pieces of thesupporting frame and comprising vertical pieces 57 connected by an uppercross-piece 58, the said vertical pieces having grooves at their inneredges to receive a slide 59, the latter carrying a trunnioned sleeve 60throu h which the connecting-rod 46 passes. The slide is raised andlowered by a screw 61 connected thereto and threaded through thecross-piece 58, said screw having a conventional form of hand-wheel 62at the upper end for turning the same.

For the purpose of adjusting the front staking-knife 20 by an attendantor operator stationed in front of the standard or post 27 we providecertain adjusting means which we shall now describe. Said knife, 20, issecured in a suitable manner to a sleeve 63 slidable upon the font endof the stakingjaw 5, and ha ing a rearwardly projecting member 63disposed at the underside of said jaw and provided at its rear end witha block 64 projecting into a longitudinal recess in the stal iiigja\v,as shown in Pig. 4. A rod 65 is threaded through this block and turnsloosely in a recess therefor in the front end of the jaw, being centeredby a screw 6G. The turning of this rod will of course move theknife-holder or sleeve (3.; backward or forward, according to thedirection the rod is turned. The rear end of the rod has fixed thereon abeveled goarwhccl 67, in mesh with a similar gcarwhcol 68, on a shortvertical shaft (3?), which latter is connected b Y a universal-joint, asshown, to an extensible rotatable shaft connected at its lower end by auniversal-joint to a short shaft 71 journalcd in a sup )orting-brackct76'. The short-shaft 71 carries a pinion T2 in mesh with a gcarwheel 73on the lower end of a vertical. shaft 74 iournalcd at its lower end inthe supporting-lilackct 76" and at its upper end in a bracket 76, saidbrackets being secured to the supporting-framc of the machine as shownin the drawings. At the upper end of the vertical shaft 74 there is aworm-wheel 75 in mesh with a worm 75 on a horizontal opcratin -shaft 76,extending forwardly and provided at its front end with a conventionalform of hand-wheel 77 for turning the same. The operating shaft 76 issupported at its rear end in depending ears of the supporting-bracket 76and near its front end by means of a bracket 78. The operation ofadjusting the forward stakingknife by means of the mechanism justdescribed will be readily apparent, and it will be noted, by referenceto Fig. 1, that the operating hand-wheel 77 is located within convenientreach of the attendant or operator stationed in front of the post orstandard 27. The extensible rotatable shaft does not interfere with theperfect operation of the lower staking-j aw, and it will be noted thatthe connection of this shaft is directly below the pivot of said jaw sothat the extension and contraction of the shaft is caused principally bythe reciprocating movements of the aw.

Having thus described our invention, what we claim as new, and desire tosecure by Letters-Patent, is

1. In a leather staking machine, the com* bination with a driving-shaft,staking-jaws, and means for operating the latter, of a device, as aroller, against which the skin or leather is held during the stakingoperation, a post or support in front of the roller and spacedtherefrom, an engaging-device cooperating with the roller and movablebetween the post or support and said roller, and means for operatingsaid engaging device from the driving shaft.

2. In a leather staking machine, the combination with a driving shaft,staking-jaws, and means for o. crating the latter, of a roller againstwhich t e skin or leather is held during the staking oieration, andmeans for holding the skin or eather against said roller comprising avertical post or standard in front of the roller, a rod pivoted at thelower end of the post or standard and having an engaging membercooperating with the roller and means for operating the rod from thedriving-shaft.

3. In a leather staking machine, the combination with a driving-shaft,staking-jaws, and means for operating the latter, of a device, as aroller, against which the skin or leather is held during the stakingoperation, a vertical post or standard in front of the r roller, a rodpivoted. at the lower end of the vertical post or standard and providedat its upper end with a member cooperating with the aforesaid. roller, atwo-part connectingrod connected to the pivoted rod and. having itsparts disposed at an angle to each other, means for o )erating thetwo-part connectingrod from the driving-shaft, and means for raising andlowering one of the parts of the connecting-rod.

4. In a leather staking machine, the combination with a drivingshaft,staking-jaws, and means for operating the latter, of a device, as aroller, against which the skin or leather is held during the stakingoperation, a movable device cooperating with the roller to hold the skinor leather, a connecting-rod connected to said movable device andcomposed of two sections connected together and extending at an angle toeach other, means for operating said connecting-rod from the drivingshaft, and means for raising and lowering one of the sections of theconnectingrod, substantially as shown and for the purpose set forth.

5. In a leather staking machine, the combination with a driving-shaft,staking-jaws, and means for operating the latter, of a device, as aroller, against which the skin or leather is held during the stakingoperation, a vertical rod )ivoted near its lower end and having a memJ81 at its upper end cooperating with the roller to hold the skin orleather, a connecting-rod connected to the lower )art of the verticalrod and com osed of two ongitudinal sections connected together so as toextend at an angle from each other, means for operating saidconnecting-rod from the driving-shaft, and means for adjusting theconnecting-rod to change the relative angle of the sections thereof.

6. In a leather stakingmaehine, the combination with a driving-shaft,staking-jaws, and means for operating the latter, of a device, as aroller, against which the skin or leather is held during the stakingoperation, a vertical rod pivoted near its lower end and provided at itsupper end with a member cooperating with the roller to hold the skin orleather, a connecting-rod connected to the vertical rod and composed. oftwo longitudinal sections connected together and disposed at an angle toeach 0t ier, a slide hav ing a trunnioned collar through which onesection of the connecting-rod extends, a frame in which the slide ismovable, a screw threaded through the frame and connected to the slide,and means for operating the connecting-rod from the driving-shaft,substantially as shown and. described.

7. In a leather staking machine, the combination with a driving-shaft,staking-jaws, and means for operating the latter, of a device as aroller, against which the skin or leather is held during the stakingoperation,

a post or standard pivoted at its lower end for adjustment to and fromthe roller, and set-screws for holding the post or standard in fixedposition; together with a vertical rod pivoted at the lower end of thepost or standard and havingla member at its up er end cooperating witthe roller to hold t e skin or leather, and means for operating the rod.

8. In a leather staking machine, the combination with a driving-shaft,staking-jaws, and means for operating the latter, of a device, as aroller, against which the skin or leather is held during the stakingoperation, a hollow post pivoted at its lower end for adjustment to andfrom the roller and having a hollow crossiece at its upper end, avertical rod pivote in the hollow post and having a member at its upperend adapted to cooperate with the roller to hold the skin or leat ier,said rod and its on aging member being movable within the hol 0w postand its cross-piece, and means for operating the vertical rod from thedriving-shaft, substantially as shown and described.

9. In a leather staking machine, the combination with a driving-shaft,staking-jaws, and means for operating the latter, of a device, as aroller, against which the skin or leather is held during the stakingoperation, a post located in front of the roller and having across-piece at its upper end, a vertical rod ivoted at the lower end ofthe post and having a member at its upper end adapted to cooperate withthe roller to hold the skin or leather, means for operating said rodfrom the driving-shaft, and uard-strips at the ends of the aforesaid memoer adapted to close the opening between the end of the member andcross-piece of the ost, substantially as shown and described 10. In astaking machine, the combination with a driving-shaft, staking-jaws, andmeans for operating the latter, of a device, as a roller, against whichthe skin or leather is held during the staking operation, a post locatedin front of the roller and having a cross-piece at its upper end, avertical rod ivoted at the lower end of the post and havmg a member atits upper end adapted to cooperate with the roller to hold the skin orleather, means for operating said rod from the driving-shaft,guard-strips connected to the ends of the aforesaid engaging-member ofthe rod, and spring-actuated rollers mounted in the cross-piece of thepost and to which the guard-strips are attached, substantially as shownand for the purpose set forth.

11. In a leather staking machine, the combination with a driving-shaft,staking-j aws, and means for operating the latter, of a device, as aroller, against which the skin or leather is held during the stakingoperation, a hollow post located in front of the roller and having ahollow cross-piece at its upper end, a rod pivoted in the lower end ofthe post and having a member at its upper end adapted to cooperate withthe roller to hold the skin or leather, means for operating said rodfrom the driving-shaft, guard-strips secured to the ends of the memberand extending therefrom across the ends of the cross-piece of the postand into said crosspiece, friction-rollers over which the strips pass,and spring-actuated rollers mounted within the hollow cross-piece of thepost and to which the guard-stri s are attached, together with a ratchetand pawl for increasing the tension of the spring of each roller,substantially as shown and described.

12. In a staking machine, the combination with a driving-shaft,staking-jaws, and means for operating the latter, of a device, as aroller, against which the skin or leather is held during the stakingoperation, a post located in front of the roller and having across-piece at its upper end, a vertical extensible rod ivoted near thelower end of the post and liaving a member at its upper end adapted tocooperate with the roller to hold the skin or leather, means foradjusting said member with respect to said roller, and means foroperating the rod from the drivingshaft.

13. In a leather staking machine, the combination with a driving-shaft,staking-jaws, and means for operating the latter, of a roller againstwhich the skin or leather is held d uring the staking operation, avertical pivoted rod having a cross-piece at its upper end adapted tomove to and from the roller, said cross-piece being curved incross-section, and having slots, a pad correspondingly curved to fitwithin the cross-piece and having securing bolts passing through theslots in said cross-piece, whereby said pad may be adjusted with respectto the periphery of the roller; together with means for operating therod from the driving-shaft.

14. In a leather staking machine, the combination with a driving-shaft,stakingjaws, and means for operating the latter, o'l' a roller againstwhich the skin or leather is hold during the staking operation, avertical extensible rod pivoted at its lower end and provided at itsupper end with a cross-piece curved in cross-section, a padcorrespondingly curved to fit within the cross-piece, means foradjusting the pad within the cross-piece, and means for operating therod from the driving-shatt.

15. In a leather staking machine, the com bination with a driving-shaft,staking-jaws and means for operating the latter, of a roller againstwhich the skin or leather is held during the staking operation, a postin front of said roller, vertical rod pivoted at the lower end of thepost and having a member at its upper end cooperating with the roller tohold the skin or leather, and means for operating the vertical rod fromthe drivingshaft; together with a movable sleeve on one of thestaking-jaws carrying one of the knives, a rod operating said sleeve, anoperating shaft having a hand-Wheel near the aforesaid post, and gearingintermediate the operatingshaft and ad'usting-rod including anextensible rotatabl e shaft, substantially as shown and described.

16. in a leather staking machine, the combination with a driving-shaft,staking-jaws and means for operating the latter, of a sleeve slidable onthe lower jaw and carrying one of the staking devices, a screw-rod foradjusting said sleeve, a vertical extensible rotatable shaft geared tothe screw-rod, and an operating-shaft geared to said vertical extensiblerotatable shaft, substantially as shown and described.

17. In a leather staking machine, the combination with a driving-shaft,staking-jaws, and means [or operating the latter, of a sleeve slidableon the lower jaw and carrying one of the staking devices, a screw-rodengaging the sleeve to adjust the same on the jaw, a vertical extensiblerotatable shaft geared to the screw-rod and supported at its lower endby a short shaft supported in a bracket attached to the supporting-frameof the machine, said extensible rotatable shaft being connected byuniversal joints at each end, a vertical shaft geared to the aforesaidshort shaft, and having a worm-Wheel at its upper end, and a horizontaloperating shaft having a worm in mesh with the worm-wheel,

substantially as shown and described.

In testimony whereof We have signed our names to this specification inthe presence of two subscribing Witnesses.

FRANK J. ZDANOWVSKI. MICHAEL A. ZDANOWSKI. *Vitnesses:

HERMAN F. GRUNINGER, LILLIAN GRUNINGER.

